Contact EngPay.com
EngPay.com is a small, independent site — there’s no support team or ticketing system behind it, just a real inbox that gets read.
What’s useful to send
- Which calculator you mean — Payment Fee, Effective Rate, Chargeback Cost, Currency Conversion, Subscription Revenue, or Processor Comparison — and what looked wrong or unclear
- A correction to something in a guide, or in the Museum of Money & Payments
- A tool or topic you think is missing
- A technical bug, ideally with your browser and device
What to expect
We read everything that comes in, though a reply isn’t guaranteed and there’s no fixed response time — this isn’t a staffed helpdesk. If your question is really about the accuracy of your own numbers or a specific business decision, that’s outside what this site can help with: the calculators produce estimates from standard, published formulas, not financial, legal, investment, or compliance advice, and EngPay.com isn’t affiliated with any processor, card network, or regulator. For that, talk to your payment provider or a qualified professional.